JPH0771168A - Power window drive control device - Google Patents

Abstract

PURPOSE:To prevent malfunction by stopping the operation of a window glass pinch-in preventive means when it is in operation if judgement exhibits that a weather strip has hardened due to a drop in the outside air temp, to result in increase of the slide resistance. CONSTITUTION:At normal operation time, a power window control circuit 26 stops a motor 24 when judgement exhibits that a pinching-in has occurred and sink a window glass by reversing the motor 24 for a specified period of time. In the low temp. operation, the control circuit 26 judges whether the sensing temp. given by a temp. sensor 34 is below the set temp. at which rubber of weather strip hardens to cause heightening of the side resistance with the window glass. If yes, the control circuit 26 passes judgement that the slide resistance between the weather strip and window glass will increase. It is judged so that the pinch-in preventive function will go in malfunction, and the pinch-in preventive function is disengaged. Thereby the window glass can fully be shut certainly and with no risk of impairing the safety even under a low temp. condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power window drive control device for opening and closing a window glass of a vehicle by a driving force of a motor.

[0002]

2. Description of the Related Art On the driver's side of a vehicle, there are some operation switches for a power window for moving a window glass of the vehicle up and down, which are provided with a manual switch and an automatic switch.

In the auto switch, when the up side contact or the down side contact is turned on, the motor continues to be driven even if the hand is released from the switch, and the window glass is moved until it is fully closed or fully opened. For example, when the window glass is moved from the fully open state to the fully closed state, when the window glass is in the fully closed state, the door frame or the like blocks the upward movement of the window glass and the drive current of the motor fluctuates. The drive of the motor is stopped by detecting the change in the drive current of the motor.

Further, the manual switch is for manually operating the vertical movement of the window glass. When the occupant continues to press the switch in a desired direction, the window glass moves in the direction corresponding to the pressing and the pressing is released. As a result, the movement of the window glass is stopped at that position.

When attempting to fully close the window glass,
If a foreign substance is present during the ascending of the window glass, it is not preferable for the safety to pinch the foreign substance.
The increase in the motor drive current when a foreign object is caught is detected, and the motor drive is reversed for a predetermined time.
There is a so-called entrapment prevention mechanism that prevents entrapment of foreign matter and the like while the window glass is rising to compensate for safety.

By the way, a weather strip mainly made of rubber or the like is provided around the window glass in order to prevent noise, rain water, noise, etc. outside the vehicle from entering the vehicle interior when the window glass is fully closed. It is provided. As shown in FIG.
The weather strips 20A and 20B are the outer panel 16
The inner panel 18 and the inner panel 18 are attached so as to face each other so as to sandwich the window glass 14, and the outer panel 16 and the inner panel 18 are attached.
It is designed to prevent rainwater and dust from entering between the windows and to prevent vibration of the glass when the window glass is moved up and down. Also, when the window glass 14 is closed, the door frame 12A
The glass run 22 provided in the vehicle has the role of preventing rainwater and dust from entering the vehicle interior and suppressing external noise.

[0007]

However, when the temperature of the outside air becomes low in a cold region or the like, the weather strip 20A or the like hardens and the sliding resistance with the window glass 14 becomes high. . Window glass 14 in this state
If an attempt is made to raise, the motor will be subjected to a large load. When a large load is applied to the motor for raising the window glass 14, the pinch prevention function provided in the power window drive control device is activated,
There may be a problem that the window glass stops rising or falls even if no foreign matter is caught, and the window glass 14 cannot be fully closed.

The present invention has been made in consideration of the above facts, and a power window drive control device which prevents the entrapment preventing means from malfunctioning and being unable to move up and down the window glass due to the temperature of outside air such as low temperature. The purpose is to provide.

[0009]

A power window drive control device according to the present invention includes an operation switch for instructing a moving direction of a window glass of a vehicle, and a window glass of the vehicle which is driven according to an operation of the operation switch. A drive means for opening and closing the door, a pinching prevention means for stopping or reversing the drive means by a predetermined amount regardless of the operation of the operation switch when a pinch of a foreign object is detected when the window glass is moved in the closing direction; It has a temperature detecting means for detecting the temperature of 1 and a releasing means for releasing the operation of the entrapment preventing means according to the temperature detected by the temperature detecting means.

[0010]

In the power window drive control device of the present invention described above, when the entrapment detection means operates while the window glass is being lifted by the driving means, the rising of the window glass is stopped or the driving means is reversed. Then, the window glass is lowered by a predetermined amount and stopped. This power window drive control device is equipped with a temperature detecting means for measuring the temperature of the outside air, preferably the temperature in the vicinity of the window glass. When the window glass trapping preventing means is activated, the temperature detecting means detects the temperature. The operation of the entrapment prevention means can be released depending on the temperature.

As a result, for example, the temperature of the outside air is low and the rubber of the weather strip is hardened to increase the sliding resistance between the weather glass and the window glass. When it has been operated, the operation of the pinch prevention means can be released to surely close the window glass.

[0012] It is preferable to release the operation of the entrapment preventing means only when the window glass is raised by operating only the manual switch, and in addition to this, the entrapment is performed by operating the manual switch. It is more preferable to release the entrapment prevention means after operating the prevention means several times. As a result, it becomes possible to safely raise and close the window glass while confirming that the occupant has no intention of being pinched, and the safety during the raising operation of the window glass is not impaired.

[0013]

FIG. 1 is a block diagram showing a schematic configuration of a power window drive control device 10 applied to this embodiment. Further, FIG. 2 shows a cross section of a main part of the vehicle door 12 cut along the vehicle vertical direction (vertical direction on the paper surface of FIG. 2).

As shown in FIG. 2, the window glass 14 provided on the door 12 can be housed between the outer panel 16 and the inner panel 18 of the door 12, and housed in the outer panel 16 and the inner panel 18. When the door 12 is moved upward from the opened state, it projects and closes the opening of the door frame 12A of the door 12. The outer window 16 and the inner panel 18 have window glass 14
Weather strip 20 in contact with each other so as to sandwich
A and 20B are arranged. These weather strips 20A and 20B are made of an elastic material such as rubber, and the door frame 12A is provided with a door glass run 22 made of an elastic material such as rubber. The weather strips 20A, 20B and the door glass run 22 prevent the windshield 14 from closing when the windshield 14 is closed.
It has a function to prevent rainwater, dust and the like from entering the vehicle interior by closely contacting with the surroundings of the vehicle and to suppress noise outside the vehicle to maintain quietness in the vehicle interior.

As shown in FIG. 1, the power window drive control device 10 is provided with a power window drive motor 24 as a drive means for vertically moving the window glass 14. The motor 24 is connected to the power window control circuit 26. The power window control circuit 26 includes, for example, a microcomputer,
When an ignition switch (not shown) of the vehicle is turned on, power is supplied from a battery provided in the vehicle to operate.

Further, the power window control circuit 26 includes
Manual UP switch 2 for driving the motor 24
8. A manual DOWN switch 30 and an auto switch 32 are connected. These switches are attached to, for example, the inner panel 18 of the door 12 so that an occupant seated in the seat can easily operate the inner panel 18 of the door 12.

In the power window control circuit 26, the motor 24 is operated while the manual UP switch 28 is being operated.
Power is supplied to drive the window glass 14 to move in a direction of raising the window glass 14, and while the manual DOWN switch 30 is being operated, the motor 24 is driven in a direction of moving the window glass 14 downward. The occupant can stop the window glass 14 in any open / closed state.

The auto switch 32 has UP and down DOWN contacts. In the power window control circuit 26, when the auto switch 32 is operated in the UP direction, the window glass 14 is fully closed. When the motor 24 is driven so as to be raised to the DOWN direction and is operated in the DOWN direction, the motor 24 is driven so as to be lowered until the window glass 14 is fully opened.

By the way, this power window control circuit 2
6 has a pinching prevention function. The pinching prevention function detects the drive current of the motor 24 during the upward movement of the window glass 14 (except when the movement is started and stopped), and the drive current exceeds a predetermined value (threshold value TH). At this time, it is determined that there is a possibility that a foreign substance is caught in the window glass 14. As shown in FIG. 3, the threshold value T is set higher than the drive current (shown by the solid line) of the motor 24 during the movement of the window glass 14 in the normal state, and the movement of the window glass 14 due to foreign matter or the like. Is blocked, the drive current of the motor 24 increases (see, for example, FIG.
When the threshold value T is exceeded, the power window control circuit 26 determines that a foreign substance or the like is caught in the window glass 14 that is moving upward. In FIG. 3, the horizontal axis represents time and the vertical axis represents the drive current of the motor 24.

In the power window control circuit 26, when it is determined that the entrapment has occurred, the motor 24 is stopped and the motor 24 is reversely driven for a predetermined time so that the window glass 14
It is possible to prevent foreign matter or the like from being caught in the window glass 14 and to easily remove the foreign matter or the like that is about to be caught.

On the other hand, the power window control circuit 26 includes
A temperature sensor 34, which is a temperature detecting means, is connected.
The temperature sensor 34 is provided, for example, between the outer panel 16 and the inner panel 18 of the door 12, and the window glass 1
The temperature in the vicinity of the weather strip 20A which is in contact with the outer side surface of No. 4 is detected. In the power window control circuit 26, the temperature detected by the temperature sensor 34 is set to a predetermined temperature (for example, -15 ° C) at which the weather strip 20A hardens and the sliding resistance between the weather glass 20A and the window glass 14 increases. It is designed to judge whether or not it is below.

When the temperature detected by the temperature sensor 34 is lower than a predetermined temperature, the power window control circuit 26 increases the sliding resistance between the weather strip 20A and the window glass 14 to prevent the entrapment. When it is determined that the function malfunctions, the trapping prevention function can be canceled.

Next, the operation of the power window drive control device 10 applied to this embodiment will be described in detail with reference to the flow charts shown in FIGS.

FIG. 4 shows a power window drive control device 1
The flowchart which shows the opening / closing operation of the window glass 14 of the door 12 by 0 is shown. It should be noted that this flowchart shows an example of opening / closing operation of the window glass 14 of the door 12, which is started when the ignition switch is turned on and stopped when the ignition switch is turned off and the driving of the vehicle ends. is there.

First, steps 100, 102 and 104
Then, manual UP switch 28, manual DOW
It is detected which of the N switch 30 and the auto switch 32 is operated. Of these, in step 102, whether the manual DOWN switch 30 is operated,
When it is detected that the auto switch 32 has been operated in the DOWN direction, the process proceeds to step 106 and the window glass 14
The motor 24 is driven so as to move in the descending direction. At this time, the manual DOWN switch 30
Is operated, the motor 24 is driven while the manual DOWN switch 30 is operated or until the window glass 14 moves to the lower end and is in the fully opened state, and the auto switch 32 operates the DOWN. When operated in the direction, the motor 24 is driven and stopped until the window glass 14 is fully opened.

On the other hand, when it is detected in step 100 that the manual UP switch 28 has been operated, step 1
Moving to 08, the driving of the motor 24 is started so as to move the window glass 14 in the ascending direction. When the movement of the window glass 14 of the motor 24 in the ascending direction is started, next, in step 110, the drive current of the motor 24 is set to the threshold value T.
The pinch by the window glass 14 is detected based on whether or not H has been exceeded. Further, in step 112, it is determined whether or not the manual UP switch 28 is in the ON state, and in step 114, it is determined whether or not the window glass 14 has moved to the fully closed state.

When it is determined in step 112 that the manual UP switch 28 is turned off or in step 114 that the window glass 14 has moved to the fully closed position, the routine proceeds to step 116, where the motor 24 is stopped and the window glass 14 is stopped. Stop moving.

In step 102, the auto switch 3
When it is detected that 2 is operated in the UP direction, the process proceeds to step 118, and the driving of the motor 24 is started so as to raise the window glass 14. In the next step 120, the window glass 1 that moves upward as in step 110 described above.
4 is detected, and in step 122, it is determined whether the window glass 14 has moved to the fully closed position. When it is determined that the window glass 14 has moved to the fully closed position, the routine proceeds to step 124, where the driving of the motor 24 is stopped,
The ascending movement of the window glass 14 is stopped so that the window glass 14 is fully closed.

Here, step 110 or step 12
When the pinch by the window glass 14 that moves upward at 0 is detected, the process proceeds to step 126. Step 12
6, when the pinch is detected, the driving of the motor 24 is stopped, and the motor 24 is reversely driven by a predetermined amount to lower the window glass 14, and then the manual UP switch 28 is pressed.
Also, the auto switch 32 is turned off (step 12
8) The motor 24 is not driven unless any switch operation is performed again.

In this way, the window glass 1 is moving up.
By preventing the foreign matter or the like from being caught by 4, it is possible to secure the safety of the power window drive control device 10 and easily remove the foreign matter or the like.

In the power window control circuit 26, if pinching is detected and the motor 24 is stopped, step 13
The process proceeds to 0, and the trapping prevention function is released. The process of releasing this pinch prevention function is performed on the window glass 1 that is rising.
4 did not operate by pinching foreign matter or the like, but the weather strip 20A or the like hardened and the sliding resistance with the window glass 14 increased, so that the drive current of the motor 24 increased (for example, one point in FIG. 3). If it operates in excess of the threshold value T as indicated by the chain line), the trapping prevention function can be released.

FIG. 5 shows an example of a trapping prevention release routine, which is executed after the trapping prevention function is activated.

In the first step 140, the temperature sensor 3
4 detects the temperature outside the vehicle, and when this temperature is below a predetermined temperature (about -15 ° C), the weather strip 20A or the like hardens due to the low temperature and slides between the window glass 14 and the like. When it is determined that the dynamic resistance has increased and the pinch prevention function has been activated, the process proceeds to step 142. Step 142
Then, it is determined whether or not the manual UP switch 28 has been operated to close the window glass within a predetermined time after the entrapment prevention function is activated. As a result, when the temperature outside the vehicle is equal to or higher than the predetermined temperature or when the operation of closing the window glass by the manual UP switch 28 is not performed within the predetermined time, the flowchart is ended without releasing the trapping prevention. , For example, when the window glass 14 is to be raised by the auto switch 32, step 1 of the flowchart shown in FIG.
02 is executed.

Manual UP switch 2 within a predetermined time
When you confirm that 8 is operated, this manual UP
By operating the switch 28, the motor 24 is driven to raise the window glass 14 (step 144). In the next step 146, it is determined from the drive current of the motor 24 whether or not the window glass 14 is in the sandwiched state, and in step 148, it is determined whether or not the window glass 14 is fully closed. Here, when the pinched state is not detected and the window glass 14 is in the fully closed state, the process proceeds to step 150 and the motor 24
Stop driving.

When the pinch state is detected again in step 146, the process proceeds to step 152, and the pinch prevention operation for reversing the motor 24 by a predetermined amount is performed. At this time, since the window glass 14 is raised only by operating the manual UP switch 28, the window glass 1 is checked while confirming that no foreign matter or the like is caught in the window glass 14 by the occupant's intention.
4 will be raised.

In this way, although the foreign matter or the like is not actually caught in the window glass 14, the caught state is detected by the sliding resistance when the window glass 14 is raised, and the window is detected. After confirming that the glass 14 cannot be fully closed, the manual UP switch 28 is once turned off (step 154), and then the occupant further attempts to fully close the window glass 14 for a predetermined time. When it is confirmed that the manual UP switch 28 has been turned on within a few seconds (for example, within a few seconds to a few dozen seconds) (steps 156 and 158), the process proceeds to step 160 to release the pinch prevention function and drive the motor 24 to drive the window. The glass 14 is raised.

After that, when it is confirmed in step 162 that the window glass 14 has moved upward and is in the fully closed state, the process proceeds to step 150 to stop the driving of the motor 24, and the manual UP switch 28 is turned off in step 164. Confirm that it was done and end. As a result, even if the pinch prevention function is activated and the windowpane 14 cannot be moved to the fully closed state even if the pinch has not actually occurred, the windowpane 14 can be safely and reliably opened. Can be fully closed.

Here, since the temperature of the outside air is lowered and the weather strip 20A and the like are hardened, and the sliding resistance between the weather strip 20 and the window glass 14 is increased, the drive current of the motor 24 is increased and the motor 24 is pinched. When the prevention function is activated, the level of the threshold value T for determining the entrapment is set to the threshold value Ta
I can think of a way to raise it. However, when the temperature is raised to the threshold value Ta, the difference from the drive current of the motor 24 when the pinch occurs in the window glass 14 becomes small, and the pinch cannot be accurately detected. Although foreign matter is caught in the glass 14,
The trapping prevention function may not work.

On the other hand, in this embodiment, the occupant releases the pinch prevention function while confirming that the windowpane 14 is not pinched, so that the windowpane 14 is moved upward. Although the trapping by the window glass 14 has occurred, the trapping prevention function does not operate, and there is no problem that the occupant forcibly raises the window glass 14 without noticing it, and the power window drive control is performed. Without sacrificing the safety of the device 10,
The raising operation of the window glass 14 can be reliably performed.

This embodiment shows an example of the present invention, and the flow chart showing the configuration of the power window drive control device 10 and the operation of the power window drive control device 10 does not limit the present invention. .

For example, in the flowchart shown in FIG. 5, in steps 142 to 152, it is confirmed that the entrapment function is activated once, and then the entrapment prevention function is released, but this is repeated a plurality of times to confirm. If the entrapment prevention function is then released, the power window drive control device 10 can be operated more safely. Further, although the present embodiment has been described as being controlled by the microphone computer provided in the power window control circuit 26, it is also possible to use a control circuit having an electric circuit configured to perform the above control.

Further, in the present embodiment, the description is made such that the entrapment is detected from the drive current of the motor, but the present invention is not limited to this, and the entrapment of a foreign substance or the like in the window glass 14 is performed based on the rotation speed of the motor 24 and the movement amount of the window glass 14. Various entrapment detection methods can be applied, such as determining whether or not there is an occurrence.

[0043]

As described above, in the power window drive control device of the present invention, it is possible to surely prevent the entrapment, and for example, the sliding resistance for moving the window glass due to the temperature decrease becomes large and the entrapment preventing means is provided. When it becomes impossible to completely close the window glass by operating, the trapping prevention means can be released only by the manual operation of the occupant. For this reason, it is possible to obtain an excellent effect that the window glass can be fully closed even at a low temperature without any loss of safety.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of a power window control circuit applied to this embodiment.

FIG. 2 is a cross-sectional view of essential parts showing the vicinity of a weather strip of a vehicle door.

FIG. 3 is a graph showing an example of changes in motor drive current.

FIG. 4 is a flowchart showing an example of the operation of the power window control circuit.

FIG. 5 is a flowchart showing an example of a trapping prevention release routine in the power window control circuit.

[Explanation of symbols]

 10 power window drive device 14 window glass 20A weather strip 24 motor (driving means) 26 power window control circuit 28 manual UP switch 34 temperature sensor (temperature detecting means) 32 auto switch

Claims (1)

[Claims] 1. An operation switch for instructing a moving direction of a window glass of a vehicle, driving means for driving the window glass of the vehicle to open and close in response to an operation of the operation switch, and a closing direction of the window glass. When trapping a foreign object is detected during movement of the foreign matter, trapping prevention means for stopping the driving means or inverting a predetermined amount regardless of the operation of the operation switch, temperature detecting means for detecting the temperature of the outside air, and the temperature detecting means A power window drive control device comprising: a release unit capable of releasing the operation of the entrapment prevention unit according to a detected temperature.